Rotary pump or turbine.



No. 785,039. PATENTBD'MAR. 14, 1905.

E. HOPKINSON E A. E. L. GHORLTONI ROTARY PUMP 0R TURBINE.

APPLIOATION FILED AUG. 2, 1904. 4

' 2 SHEETS-SHEET 1.

No. 785,039; PATENTED MAR. 14,1905.

E. HOPKINSON & A. E. L. GHORLTON.

ROTARY PUMP 0R TURBINH.v y

APPLICATION lFILED AUG. 2, 1904. l

` ZSHEETS-SHEET 2.

FIG. Q..

UNITED STATES Patented March 14, 1905.

PATENT OEEICE. l

EDWARD HOPKIN SON AND ALAN E. L. OHORLTON, OF SALFORD, ENGLAND.

ROTARY PUMP on TURBINE.

SPECIFICATION forming part of Letters Patent No. 785,039, dated Il/Iarch` 14, 1905.

Application filed August 2, 1904. Serial No. 219.253.

1'0 @ZZ whom, it may concern:

Be it known that we, EDWARD HorKINsoN and ALAN ERNEST LEOERIC OHORLTON, subjects of the King of Great Britain and Ireland, residing at Salford Ironworks, Cross street, Salford, in the county of Lancaster, England, have invented a certain new and useful Rotary Pump or Turbine, (for which we have filed application for British Patent N o. 8,855, dated April 18, A. D. 1904;) and we do hereby declare the following` to be a full, clear, and exact description of the invention, suchy as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in rotary pumps or turbines of the .type described in Reynoldss patent, No. 541,455, of June 18, A. D. 1895.

In the drawings, Figure 1 is a longitudinal section through a quadruple pump. I is the suction or inlet. O is the delivery or outlet. Fig. 2 is a transverse section on the line of Fig. 1 as seen in the direction of the arrow w. Fig. 3 is a transverse section on the line g/ yof Fig. 1 as seen in the direction of the arrow y.

Referring first to the case of multiple pumps, such as shown in Fig. 1, these are built up of end pieces and any desired number of intermediate sections, such as a a' a2. Each of the sections has a partition, diaphragm, or wall I) on the suction side, (herein referred to as the front side,)in which are openings or ports c, openinginto passages d, formed between the front partition or diaphragm Z) and the rear partition or wall e. The chamber in which each section of the wheel el revolves is formed by the juxtaposition of two cavities or recesses ff', one of which is in the rear side of one of the sections, while the other is in the front side of the next section. In the case of the end chambers front and rear cavitiesff" are formed in the end and rear walls of the end pieces, respectively.

In the'passages CZ are return vanesor guides L, Fig. 3, so shaped as to prolong the sweep or curve of the immediately preceding guidevanes 7n. gential to the central opening in which the wheel g revolves and impart a rotary direc- The curved return-vanes /i are tan-V .,ter into the section of the wheel in the Vnext following chamber. The boss on the delivery side of one section of the wheel projecting through the front Apartition b forms a continuous curve with the part of the curved boss on the suction side of the next following wheel, thus forming a non-abrupt conduit for the water into the curved cavity of the wheel.

As shown in Figl, the wheel is built up of a number of similar sections, such as g, (corresponding to the number of chambers) each mounted "on and keyed to a common shaft m. The blades a of the wheel are, as shown in the drawings, curved. They may be, however, radial or tangential in direction.

The passage for the water in each section of the wheelas seen in longitudinal section slopes away in a curve from the curved boss at the suction side, thus still further carrying into effect what is thel essential feature ofthe present invention-namely, the avoiding of abrupt changes of direction or velocity of the water from one end to the other of the pump.

By the rotation of the wheel g the water is directed from its periphery between curved i guide-vanes which are formed as projections on the rear side of the partition e and which form an easy path for the water to the ports c, whence the water passes to the next passages d. By this combination of curved guides the water takes an easy spiral-like path of approximately uniform increase of curvature, and thus sudden changes in the directionof the flow of the water are avoided. The central openings in all the partitions L and e,VV

as Well as in the ends 0 and j), are coaxial and of equal radius. This feature greatly facili- IOO is to say, the back of the rst is toward thefront of the second, and so on-there results a pressure lengthwise of the shaft m toward the suction end of the pump. To balance this pressure, a disk or piston-like head r is attached to the shaft m. 1n Fig. 1 this disk or piston-like head is shown as formed integral with the boss of the nearest wheel-section. It runs in a central chamber s, formed in the rear end piece p. It may, however, run in any of the central openingsof the body of the pump.

The cavity s. communicates, by means of the passage z5 and a connecting-pipe,with the suction end of the pump, so that by making the head fr of suitable area the longitudinal pressure on the moving parts is wholly or partly counterbalanced. No claim is, however, made herein to this longitudinal counterbalancing.

What we claim` as our invention, and desire to secure by Letters Patent, is-

1. A rotary pump or turbine having a body composed of end pieces andaplurality of hollow sections forming chambers for the reception of the wheel by the juxtaposition of cavities in alternate sections and in the end walls curved guides 7c forming spiral-like passages external to the chambers, ports e intercommunicating therewith and with passages d formed by curved guides It in the next section, the said end pieces and sections having central apertures for the reception 'of the wheel, the said central apertures being coaxial and of equal radius, a wheel rotating therein and a water inlet and outlet substantally as and for the purpose set forth and shown.

2. A rotary pump or turbine consisting of a wheel having a plurality of sections, each having a hollow interior with vanes therein and curved bosses on the suction and delivery sides, the hollow interior of one section, the curved boss on the suction side thereof, and the curved boss on the delivery side of the preceding adjacent section forming a path of continuous curved contour, a pum p-body having a plurality of chambers for containing the wheel, and curved guides, ports, and passages, the whole operating to direct the water in easy curved paths from the suction to the outlet side without abrupt changes of direction, substantially as set forth and shown.

3. In a multistage centrifugal turbine or similar pump the combination of end pieces or heads and a plurality of intervening hollow sections having partitions or diaphragms for the reception of a multiple wheel or plurality of impellers mounted ou a common shaft, the central apertures of the heads or ends and those of the diaphragms or partitions being coaxial and of equal radius, substantially as set forth..

In witness whereof we have hereunto set our hands in presence of two witnesses.

EDW. HOPKINSON. ALAN E. L. CHORLTON. Witnesses:

JOHN HALL, G. W. TUNSTALL. 

